Changes to m4/src/m4.h,v [branch-1_4]

[Eric Blake]

CVSROOT:        /sources/m4
Module name:    m4
Branch:         branch-1_4
Changes by:     Eric Blake <ericb>      06/06/22 17:43:05

Index: src/m4.h
===================================================================
RCS file: /sources/m4/m4/src/m4.h,v
retrieving revision 1.1.1.1.2.10
retrieving revision 1.1.1.1.2.11
diff -u -b -r1.1.1.1.2.10 -r1.1.1.1.2.11
--- src/m4.h    22 Jun 2006 14:55:48 -0000      1.1.1.1.2.10
+++ src/m4.h    22 Jun 2006 17:43:05 -0000      1.1.1.1.2.11
@@ -477,13 +477,25 @@
 /* Other debug stuff.  */
 
 #ifdef DEBUG
-# define DEBUG_INPUT
-# define DEBUG_MACRO
-# define DEBUG_SYM
-# define DEBUG_INCL
+# define DEBUG_INCL   1
+# define DEBUG_INPUT  1
+# define DEBUG_MACRO  1
+# define DEBUG_OUTPUT 1
+# define DEBUG_STKOVF 1
+# define DEBUG_SYM    1
 #endif
 
 /* Convert a possibly-signed character to an unsigned character.  This is
    a bit safer than casting to unsigned char, since it catches some type
    errors that the cast doesn't.  */
 static inline unsigned char to_uchar (char ch) { return ch; }
+
+/* Take advantage of GNU C compiler source level optimization hints,
+   using portable macros.  */
+#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ > 4)
+#  define M4_GNUC_ATTRIBUTE(args)      __attribute__(args)
+#else
+#  define M4_GNUC_ATTRIBUTE(args)
+#endif  /* __GNUC__ */
+
+#define M4_GNUC_UNUSED         M4_GNUC_ATTRIBUTE((unused))